System for generation of polyphase current



June 10, 1930. c. w. HOUGH V SYSTEM FOR GENERATION OF POLYPHASE CURRENTFiled April 24, 1926 IN V EN TOR. ($222222 W56 AIIIII ATTORN PatentedJune 10, 1930 v UNITED STATES PATENT OFFICE CLINTON. w. noun, orBOONVILLE, NEw'YoRx, ASSIGNOB, BY mEsNE TO FEDERAL TELEGRAPH COMPANY, ACORPORATION OF CALIFORNIA SYSTEM FOR GENERATION F POLYPHASE CURRENTApplication filed April 24,

My invention relates broadly to the generation of highfrequency currentsand more particularly to the generation of polyphase current.

One of the objects of my invention is to provide a method of generatingpolyphase current by the action of an electronic stream which isdeflected from point to point about a predetermined pat-h. 7

Another object of my invention is to provide a system for the generationof polyphase high frequency current wherein an electron stream is movedperiodically from one path to another for successively exciting separateelectron tube circuits in the output circuits of which polyphase currentmay be developed.

Still another ob'ect of my invention is to provide a system or thegeneration of poly- 2 phase high frequency current in which an electronstream is moved through an orbitfor effecting successive pathsofconductivity to diflerent electron tube circuits which are thussuccessively energized for the development of polyphase current.

A still further object of my invention is to provide means forautomatically shifting the position of an electron stream about a pathin which a plurality of contacts are positioned with separate circuitconnections from each of the contacts to independent electron tubecircuits the output circuits of which may be connected in three phasemanner for the development of three phase ourrent therein.

My invention will be more fully understood from the specificationhereinafter following by reference to the accompanying drawings inwhich:

Figure 1 diagrammatically illustrates my invention and showing thecircuit arrangements between the rotatable electron beam and the severalelectron tube circuits by which three phase current is developed; Fig.

2 illustrates one method which I may provide,

for rotating the electron beam; Fig. 3 illustrates a modifiedarrangement which I may provide for securing deflection of the electronstream; Fig. 4 illustrates a magnetic '50 control system for securingrotation of the 1926. Serial No. 104,467.

electronic beam over a predetermined path ASSIGNMENTS,

in which the several contacts are located;

Fig. 5 is a still further modification of a circult arrangement formoving the electron beam; and Fig. 6 shows a photoelectric cell systemembodying the principles of my invention.

My invention contemplates the employment of an electron tubedischargedevice in which an electron stream is employed in the form of acathode ray which may be deflected through several different positionsin an electron tube in a predetermined path for the successiveenergization of a plurality'of independent electron tube circuits. Theelectron tube circuits are arranged to be successively energized and theoutput circuit,

Y or delta connected, for the development of three phase current. Thethree phase current is delivered to the load through a Y 0.1- deltacoupling system. The periodic deflection of the electron beam or cathoderay in a predetermined path is effected by any suitable shift of anelectromagnetic or electrostatic field, as will be described more fullyhereinafter. The successive energization of the several independentelectron tube circuits at time periods displaced in phase perany desiredphase displacement, as will be described more fully hereinafter.

Referring to the drawings in more detail, reference character lindicates a cathode ray tube having means for developing an electronicdischarge in the. form of a beam 2 which is shiftable about an orbitrepresented at 3. The deflection or displacement of the electron beam 2is brought about by various methods, which I have illustrated in theother to the terminals 11, 12 and 13 which extend mits the generation ofpolyphase current at 'tube 15 has inductance into the tube 1 and formcircuit connections for the grid circuits of electron tubes 14:, 15 and16. The input circuits are each completed through the electron beam 2 bythe common connection 17 which connects to the source of cathode raysrepresented: at 18. Each of the tubes 14, 15 and 16 include the gridfilament and plate electrodes with the grid and filament electrodesdisposed in the several input circuits. and the plate and filamentelectrodes disposed in the output circuits. The output circuit of tube14 includes inductance 19, while the output circuit of 20 connectedtherein and these inductances connected in Y to inductance .21 includedin the output circuit of electron tube 16. A source of high potential 22is connected in the common circuit at the central point 2 1 of the Yconnected 1nductances 19, 20 and 21. These inductances are coupled withY connected inductances 25, 26 and 27 which connect to a suitableutilization circuit represented generally at 28.

In Fig. 3 I have shown an inductive system for securing deflection ofthe electron beam 2 about the orbit 3 as distinguished from thecapacitive system of deflection represented in Fig. 2. The inductivewindings 29 and 30 are arranged with respect to the electron beam 2 insuch manner that the electronic stream is moved about the orbit 3 forsuccessively exciting the electron tubes 14, 15 and 16. In Fig. 4.- Ihave shown a further method of securing the revolving field where thealterhating current source 8 connects with the electromagnetic windings31 and 32 on 0pposite sides of the tube 1 with a polarized winding 33which cooperate in such manner that the shifting electromagnetic fieldin accordance with the periodic current reversals from the alternator 8tends to revolve the electron stream Within the orbit 3.

In Fig. 5 I have shown air core inductances 34, 35 and 36 arranged aboutthe tube 1 for producing the revolving field where w nding 36 isnormally biased through winding 37 from battery 38. It will beunderstood that various other methods may be employed for securing therevolving electronic beam.

In the operation of the generating system of my invention the electronicbeam is automatically shifted about the orbit 3 for successivelyenergizing the several electron tube circuits and impressing currentsirr proper phase relation in the Y connected output circuit. Thesecurrents are transferred to the Y connected system and sup lied to thecircuit 28 from which they may e led to an amplifier or any othercircuit for utilization.

- In lieu of the terminals 11, 12 and 13 which extend into the path ofthe ray 2 I may provide photo-electric cell elements 39, 40, 4:1 asshown in Fi 6 which become successively affected by t 1e moving cathodestream 2. The output of the light sensitive elements may then be used tocontrol an electron tube system for the production of polyphasecurrents.

While I have described my invention in certain particular embodiments, Idesire it to be understood that modifications in detail may be madewithout departing from the spirit of my invention and that nolimitations upon my invention are intended other than are imposedby thescope of the appended claims.

What I claim as new and desire to secure by Letters Patent in the UnitedStates is as follows:

1. In a system for generating three phase high frequency current, anelectron discharge device, a plurality of means associated with saidelectron discharge device for deflecting the electron discharge to aplurality of dilfering positions, a plurality of terminals projectinginto said electron discharge device in the path of said electrondischarge, a plurality of electron tubes each having grid, filamentandplate electrodes, output circuits interconnecting said plate electrodesin poly phase manner and connections between said terminals and saidgrid electrodes for successively impressing electric charges on saidgrid electrodes for effecting the generation of polyphase current insaid output circuits.

2. A system for generating three phase high frequency current, anelectron discharge tube, means for projecting a beam of electronsthrough said tube, a plurality of terminals within said electron tube,means for successively deflecting said beam of electrons from one ofsaid terminals to another, a plurality of electron tube circuitsindependently connected with said terminals and a three phase circuitconnected with said last mentioned electron tube circuits wherebysuccessive charges may be impressed upon said electron tube circuits forthe generation of three phase current therein by the shifting of saidbeam of electrons from one of said terminals to another.

. 3. In a system for generating polyphase high frequency oscillation, anevacuated vessel, a cathode ray within said vessel, means for movingsaid ray to a plurality of difierent 7 positions, a plurality ofelectron tubes, each having grid, filament and plate electrodes, inputand output circuits interconnecting said,.electrodes, a plurality ofterminals 10- catifl within said evacuated vessel in the path of saidcathode-ray and connections between individual ones of said terminalsand each ofsaid input circuits, a plurality of inductances connected insaid output circuits and associated in three phase manner, and means forsuccessively impressing charges on each of said grid electrodes inaccordance with the movement of said ray for generating three phasecurrent 1n said inductances.

4. A system for generating three phase high frequency, oscillationscomprising, an evacuated vessel, means for producing a beam of electronstherein, means for periodically moving said beam of electrons about apredetermined orbit, a plurality of terminals h)- cated within saidorbit in the path of said beam, a plurality of electron tubes eachhaving grid, filament and plate electrodes, connections from individualones of said terminals with said grid electrodes, a common connectionfor all of said filament electrodes with said source of electrons, aplurality of induct'ances connected in each of said plate electrodes andarranged in three phase manner whereby successive charges are impressedupon said grid electrodes during the movement of said beam for thegeneration of three phase high frequency current in said inductances.

5; In a system for generating polyphase high frequency current, anevacuated vessel including a source of electrons, means for projectingsaid electrons into a beam, means for movingsaid beam in an orbit, apluralit '25 of terminals locateddn said orbit in the pat sel, means insaid vessel for projecting an electron stream in the form of a beam,

a plurality of control members-located around said -vessel forperiodically deflecting said beam to a plurality of different positions,

electrodes mounted in said evacuated vessel for periodicallyintercepting the said beam, a plurality put and output circuits with theinput circuit of each of said tubes connected to one of Said electrodes,a plurality of inductances connected in three circuits, a plurality ofinductances associated inductively therewith and means whereby each ofsaid input circuits may be successively excited through the action ofsaid electron stream for the generation of three phase high frequencycurrents in said last mentioned inductances.

ed with individual ones of said phase determining means for saidelectron stream, a plurality of electron tubes, each having grid,filament and'plate electrodes with said plate electrodes connected in athree phase circuit, terminals extend- -ing into said electron streamand connected with said grid electrodes whereby successive charges areimparted to said grid electrodes for generating three phase current insaid three phase circuit. v 8. A system for generating three phasecurrent comprising independent electron tubes each including grid,filament and plate electrodes, a tube system including an emitter ofcathode rays and a plurality of targets arranged in an orbit withrespect to said emitter, a circuit extending between each of saidfilament electrodes, a source of potential and said emitter, anindependent connection betweeneach of said grid electrodes and aselected one of said targets,a three phase cir- I cuit interconnectingsaid plate electrodes, and means for successively shifting sa-id'cathode rays to each of the electrodes in an orbit for successivelyenergizing the grid electrodes of said tubes from said source ofpotential and generating three phase current in said three phasecircuit.

In testimony whereof I afiix m signature.

CLINTON W. OUGH.

of electron tubes each having in- I phase manner in said output I 7. Ina system for generating three phase high frequency current, anevacuatedvessel,

means for projecting an electron stream therein, a source of alternatingcurrent, a plurality of phase determining means located in circuit withsaid source, means connectperiodically deflecting

